20481760

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1$

素因数の和:300

約数の個数: 96

約数和(自身を含む): 53555040

約数和(自身を除く): 33073280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 43, 52, 65, 80, 86, 104, 130, 160, 172, 208, 215, 229, 260, 344, 416, 430, 458, 520, 559, 688, 860, 916, 1040, 1118, 1145, 1376, 1720, 1832, 2080, 2236, 2290, 2795, 2977, 3440, 3664, 4472, 4580, 5590, 5954, 6880, 7328, 8944, 9160, 9847, 11180, 11908, 14885, 17888, 18320, 19694, 22360, 23816, 29770, 36640, 39388, 44720, 47632, 49235, 59540, 78776, 89440, 95264, 98470, 119080, 128011, 157552, 196940, 238160, 256022, 315104, 393880, 476320, 512044, 640055, 787760, 1024088, 1280110, 1575520, 2048176, 2560220, 4096352, 5120440, 10240880, 20481760]

約数ペア:

[(1, 20481760), (2, 10240880), (4, 5120440), (5, 4096352), (8, 2560220), (10, 2048176), (13, 1575520), (16, 1280110), (20, 1024088), (26, 787760), (32, 640055), (40, 512044), (43, 476320), (52, 393880), (65, 315104), (80, 256022), (86, 238160), (104, 196940), (130, 157552), (160, 128011), (172, 119080), (208, 98470), (215, 95264), (229, 89440), (260, 78776), (344, 59540), (416, 49235), (430, 47632), (458, 44720), (520, 39388), (559, 36640), (688, 29770), (860, 23816), (916, 22360), (1040, 19694), (1118, 18320), (1145, 17888), (1376, 14885), (1720, 11908), (1832, 11180), (2080, 9847), (2236, 9160), (2290, 8944), (2795, 7328), (2977, 6880), (3440, 5954), (3664, 5590), (4472, 4580)]